Abstract
An abnormal mucosal cell-mediated immune response plays a fundamental role in the pathogenesis of celiac disease. To characterize locally infiltrating T cells, gliadin-specific T-cell clones were isolated from two treated celiac patients. Mucosal biopsies were cultured in vitro for 24 hr with a peptic-tryptic digest (PT) of gliadin. T-cell clones (TCC) were then isolated by limiting dilution. The production of interferon-γ (IFN-γ) and interleukin-4 (IL-4) was evaluated by ELISA in culture supernatants obtained after a short incubation with anti-CD3 and PMA, or with antigen. Twenty-two TCC were specific for gliadin and/or PT. All were CD3+, CD4+, CD8+, TCR αβ+. In one such clone the PT-specific response was inhibited by an anti-DQ, but not by an anti-DR antibody. Of the five gliadin-specific TCC examined, four produced IL-4 and high levels of IFN-γ; the remaining one initially produced only IL-4, but subsequently also IFN-γ. All clones obtained from the celiac mucosa, including the gliadin-specific ones, produced high levels of IFN-γ, in most cases with IL-4. This cytokine profile could explain most of the immunological features of the celiac mucosa.
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Troncone, R., Gianfrani, C., Mazzarella, G. et al. Majority of Gliadin-Specific T-Cell Clones from Celiac Small Intestinal Mucosa Produce Interferon-γ and Interleukin-4. Dig Dis Sci 43, 156–161 (1998). https://doi.org/10.1023/A:1018896625699
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DOI: https://doi.org/10.1023/A:1018896625699